ALGORITHM The mathamatical expression which is used to scramble & decode the data stream of satellite transmissions
ALTDVB DVB-S Viewer software for Pc
APID Audio Packet Identifier - identified by a number eg: 292 might be German & 293 English
ARC Refers to the Clarke Belt named after Arthur C Clarke the famous scientist & writer. Satellites are located on this ARC in a Geo-Stationary orbit. This mean that they appear stationary to a viewer on the Earth (eg; a satellite dish). The ARC is approx 23400 miles above the Earth. A satellite at the highest point on the ARC has the highest dish Elevation. Moving East or West of centre has a lower Elevation. Practical views from Earth are 60º East to 60º West
AU Automatic Update- usually of keys updated automatically
BIN BINARY: eg: .bin = binary file
Biss Basic Interoperable Scrambling System - Type of Encryption
BLIND SCAN Method for satellite receiver to find the less common s/r channels (eg: Feeds)
C Band Satellite Band 3.4GHz to 4.8Ghz (Still in use but less common now)
CAM Conditional Access Module - Smartcard Reader for CAS
CAS Conditional Access System - Method of providing or denying authorisation to view payTv
CAT Conditional Access Table
CI (Ci) Common Interface - slot for installing a Cam
db A logarithmic measurement unit used for measuring the noise figures of an LNB. The lower the better
DBS Direct Broadcasting by Satellite
DCW Direct Control Word - usually as a 16 bit Hexadecimal number which can unscramble a channel when necessary
DEC Decimal - number in base 10
DiSEqC Digital Satellite Equipment Control - a communication protocol for use between a satellite receiver and a multi-LNB switch or dish motor
DVB Digital Video Broadcasting
DVB-C Digital Video Broadcasting by Cable
DVB-S Digital Video Broadcasting by Satellite signal
DVB-T Digital Video Broadcasting by Terrestrial signal
ECM Electronic Counter Measure - Signal sent to update legitimate smartcards or 'knock-out' illegal smartcards
EIRP Effective Isotropic Radiated Power - Measured in KiloWatts (kw)
ELEVATION The angle of the dish in the vertical plane
EMM Entitlement Management Message - Qualifies your right to view pay Tv
EMU Emulator - Software or Hardware that imitates a system (eg; a CAM)
EPG Electronic Programme Guide
FEED Temporary uplink transmission of live events or news items
FEEDHORN The Waveguide which directs the satellite Microwave signal to the LNB's receiving elements
FEC Forward Error Correction
FIRMWARE The satellite receivers operating system
GHz Frequency range. 1000Mhz = 1GHz
H Horizontal Polarisation
HD (HDTV) High Definition Tv picture standard as a result of increased Line Scanning
HEXADECIMAL (Hex) Number system to base 16 - 0 1 2 3 4 5 6 7 8 9 A B C D E F
JACK Motorised arm used to push or pull a Polar Mount to move a satellite dish to a satellites position
JTAG Joint Test Action Group - is the usual name used for the IEEE 1149.1 Standard Test Access Port
used for testing printed circuit boards using boundary scan. Often used to re-flash damaged stb bootloaders
KEYS The 8 or 16 bit Hex number which is the key to unlock the algorithm of the scrambled channel
Ku BAND Satellite Band 10.700Ghz to 12750GHz (Most used)
LAT/LONG Lattitude & Longitude - A position on the Earth expressed in degrees. Needed for USALS operation
LNB Low Noise Block Converter - Downconverter for the satellite signal
LNBf Low Noise Block Converter with feedhorn - Downconverter for the satellite signal
LOADER Piece of software which interfaces the STB to the Computer to upload the Patch & Keys
MAC Media Access Control address
MSS Mobile Satellite System
MPEG Moving Picture Experts Group
MPEG2 Usual method of Video format for domestic satellite Tv
MPEG4 High Definition format for domestic satellite Tv
MUX Multi Channel (also Multiplex)
NETWORK SEARCH Method to scan for new transponders using the satellites Network Allocation Table.. thus finding all available channels
NIT Network Information Table
OFFSET DISH Type of satellite dish which is a section of a larger prime focus dish. The LNB is mounted off-centre and doesn't obstruct the signal to the dish
PACKAGE Group of channels in the providers satellite Tv bouquet
PAT Program Association Table (MPEG-2 TS)
PATCH A piece of software that Emulates a CAM to decode scrambled channels
PID Packet Identifier for Audio & Video streams. One channel may have many Audio tracks (APIDS)
POLAR MOUNT Satellite dish mounting that tracks the Clarke Belt when moved left to right (or vice versa)
PRIME FOCUS Type of satellite dish which has a central LNB feed (Usually 1.2M size or greater). The LNB partially obstructs the signal to the dish
QPSK Quadrature Phase Shift Keying
ROM Read Only Memory eg: Rom142 refers to a read only memory named 142
RS232 Serial Interface Standard used by computers on the COM ports.. (often meaning a Null-Moden cable in satellite use)
SCAN Method for a satellite receiver to find satellite channels by looking at all the available transponder frequencies
SD or SDTV TV Standard Definition TV
SKEW The rotation angle (+/-) that the LNBf needs to be adjusted to match a satellites longitude
SIT Satellite interactive terminal
SOFTCAM Collection of 8bit & 16bit keys used to unlock an encryption
S/PDIF Specifies a Data Link protocol for carrying digital audio signals between devices and stereo components
The name stands for Sony/Philips Digital Interconnect Format (more commonly known as Sony Philips Digital InterFace)
STB Set Top Box - eg: satellite receiver
S/R (SR) Symbol Rate - speed rate of data transmission bits
TS Transport Stream - Name of the digital data received by a satellite receiver
USALS Universal Satellites Automatic Location System - a satellite motor protocol that automatically creates a list of available satellite positions in a motorised satellite dish setup. By providing the LAT/LONG position of the receiving dish USALS can calculate where each satellite is from the dish
V Vertical Polarisation
VPID Video Packet Identifier - identified by a number
Vplug Software multiCAS emulator plugin
V_keys Keys used for Vplug
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